Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Study on the Damage of CFRP Laminated Composites Under Out-of-Plane Load

횡방향 하중을 받는 CFRF 적층복합재의 내부손상에 관한 연구

  • Kim, Moon-Saeng ;
  • Park, Seung-Bum ;
  • Oh, Deug-Chang
  • 김문생 (부산대학교 기계설계공학과. 기계기술연구소) ;
  • 박승범 (부산대학교 대학원 기계설계공학과) ;
  • 오득창 (부산대학교 대학원 기계설계공학과)
  • Published : 1995.11.01
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Abstract

An investigation was performed to study the inner damage of laminated composite plates subjected to out-of-plane load. During the investigation, inpact velocity and equivalent static load relationship was derived. Reddy's higher-order shear deformation theory(HSDT) and Hashin's failure criteria were used to determine inner stresses and damaged area. And impact testing was carried out on laminated composite plates by air gun type impact testing machine. The CFRP specimens were composed of [ .+-. 45 .deg. ]$_{4}$and [ .+-. 45 .deg. /0 .deg. /90 .deg. ]$_{2}$ stacking sequences with 0.75$^{t}$ * 26$^{w}$ * 100$^{l}$ (mm) dimension. After impact testing. As a result, a relationship holds between damaged area and impact energy, and a matrix cracking was caused by the interlaminar shear stress in the middle ply and was caused by the inplane transverse stress in the bottom ply.

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